Posted: Mon May 25, 2009 10:13 am Post subject:
A collection of circuits by NicolasSubject description: links to all the threads

I couldn't resist gathering all these circuits somewhere.

nicolas3141 wrote:

These circuits are not meant to be highly featured and sophisticated, but are intended to be easy to build and understand for those starting out in sdiy. Good enough to be musically useful, but simple enough so that you can build them in a few hours and then get back to making that music. A bit like the MFOS Soundlab, but with a more modular approach (and a bit more emphasis on CV generation). I also try and only use readily available and easily substitutable parts.

I just have to say thank you to nicolas 3141 for his work and to Pehr for cataloguing the collection. These are very interesting little circuits. And also well suited to adapting to stampbox use, which is my primary focus ATM_________________http://www.frequencycentral.co.uk/

These circuits are not meant to be highly featured and sophisticated, but are intended to be easy to build and understand for those starting out in sdiy. Good enough to be musically useful, but simple enough so that you can build them in a few hours and then get back to making that music. A bit like the MFOS Soundlab, but with a more modular approach (and a bit more emphasis on CV generation). I also try and only use readily available and easily substitutable parts.

I use the LM324 for a couple of reasons. The main one is that it is one of the crappiest quad opamps out there and if my prototypes work with an LM324 the design should work with most other opamps as well. Secondly it is cheap and available everywhere and unlikely to become unavailable anytime soon. It also seems pretty rugged, while having lowish current consumption which makes it suitable for battery powered gear. And its inputs and outputs can go closish to supply voltages which is also good in the battery powered world.

Wow! Cool! Thanks for these, I must have missed them earlier. Bonus points for thinking of battery operated stuff. We'll have to start a solar and wind-powered thread next _________________Esoteric drones and nonlinear distortion
Custom/handmade experimental instruments
macumbista.net

Thanks for the feedback. It is really good to know people are finding this stuff useful. I am often posting these things after only building one prototype, so there is definitely scope for mistakes and it is very helpful if people reply to let me know whether they had any problems or not.

Many thanks, nicolas. They might not be sophisticated and full featured,
but they're inspiring to me (and I'm sure to others, considering the current economic downturn).
It's hard to sock away enough for exotic components and PCB making when you're barely making rent...

Does anyone know of a really "simple" V/Hz keyboard controller circuit for these? There are a few around for 1V/Oct (MFOS comes to mind) but nothing more or less "simple" for the V/Hz crowd. I don't really need more than a CV out with Port/Glide if possible.

[edit] or is it possible to modify the ribbon controller for keys? possibly resistors in series etc...

Hey Nicolas, in that CGS controller schematic, would any components need to be changed when using a bi-polar 9V PSU or will it work as is? I'm just curious because your controller is missing the Gate out which would be useful for ADSR and Eric B's controller is rated for 12-15V.

Hi there. Just wanted you to know, I finished my project (but still making some tweaks here and there). It is no exaggeration to say that you inspired me to do it. I though it would be impossible (I became very frustrated trying to take on something complex), but stumbling upon your thread here, on this forum, made me think that I was wrong. And some 5 month later I'm tweaking my own mini-modular! So thank you.

Poyvox VCF (1x) [really simple filter, 3 single opamps, 2 transistors, sounds harsh and metallic, I mean, no way i can get flute-like tone out of it (mellow moogalike sound), it really reminds me of soviet synths - it makes noise even if you don't need it]

Little tune I made, well, to celebrate and glorify my new instrument. All was done with lfo doing something, recorded, then fit into tracks tempo. There was no way to preview what was going to be next note or anything, really sound on sound, or sound afte

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